The National Guard has struggled to implement a plan to test troops flowing into and out of Washington, D.C., for Covid-19, with some Guard members being forced to find their own tests and others pressured to leave their quarantine early to report to duty.

Already, hundreds of Guard members who poured into Washington, D.C., after the Jan. 6 assault on the U.S. Capitol have tested positive for Covid-19 or are quarantining in nearby hotels, three Guard sources said. Guard leadership has declined to release an official number of positive cases, but troops and lawmakers alike worry that the deployment is becoming a superspreader event.

be able to identify who that person was.”

Several senators called attention to the matter on Thursday night, with some even reaching out directly to National Guard commanders and Capitol Police officials. Murphy spoke with the Capitol Police chief, who has since denied that the department ordered the troops to vacate congressional buildings.

Sen. Joni Ernst (R-Iowa), who herself was a member of the National Guard for 22 years, said she and other lawmakers are in touch with Guard officials about ensuring a safe environment for troops stationed at the Capitol. And Sen. Tim Kaine (D-Va.) said he was outraged over the “ingratitude” displayed toward the soldiers.

“Obviously the Senate had not gotten as involved in this because we had hoped it was being worked out between Capitol Police and the Guard,” Murphy said. “Obviously there’s some rough edges, so there’s a lot of us working on this right now.”

Though many Guard members began leaving the capital this week, thousands of troops could be asked to stay on duty through March to conduct riot security, according to three officials. The Guard is expecting the federal agencies to request that several thousand troops remain in D.C. in anticipation of additional unrest, one defense official said. The request would be routed through the Pentagon and the governors’ offices. Military.com first reported the news.